Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as keeping the input and output traces short and separate, using a solid ground plane, and minimizing parasitic inductance and capacitance.
To ensure stability, follow the recommended component values and PCB layout, and make sure the input and output capacitors are of high quality and have low ESR. Additionally, ensure that the feedback resistors are properly matched and that the loop gain is sufficient.
The maximum input voltage is not explicitly stated in the datasheet, but it's recommended to keep the input voltage below 6V to ensure reliable operation and prevent damage to the device.
The LM3553SDX/NOPB is rated for operation up to 125°C, but it's recommended to derate the output current and voltage at higher temperatures to ensure reliable operation. Additionally, ensure that the PCB and surrounding components are also rated for high-temperature operation.
Use a oscilloscope to measure the input and output waveforms, and check for signs of oscillation or instability. Verify that the input voltage and current are within the recommended range, and check the PCB layout for any issues. Consult the datasheet and application notes for troubleshooting guidelines.
LM3553SDX/NOPB datasheet
by Texas Instruments
